Home / 67,181.90-100,769.20-20,431.13

Finding the Fourth Proportional to 67,181.90, 100,769.20 and 20,431.13

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Solution

The fourth proportional to 67,181.90, 100,769.20 and 20,431.13 is: 30,645.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,181.90 : 100,769.20 = 20,431.13 : x
  2. Step 2: Convert to fraction form
    67,181.90/100,769.20 = 20,431.13/x
  3. Step 3: Cross multiply
    67,181.90x = 100,769.20 × 20,431.13
  4. Step 4: Simplify right side
    67,181.90x = 2,058,828,070.27
  5. Step 5: Solve for x
    x = 2,058,828,070.27/67,181.90
  6. Step 6: Final answer
    x = 30,645.58

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.